MCQOPTIONS
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MCQOPTIONS
This section includes 493 Mcqs, each offering curated multiple-choice questions to sharpen your Mongodb knowledge and support exam preparation. Choose a topic below to get started.
| 101. |
Glazing in grinding wheels takes place when the |
| A. | wheel is too hard or wheel revolves at a very high speed |
| B. | wheel is too soft or wheel revolves at a very slow speed |
| C. | wheel is too hard and wheel revolves at very slow speed |
| D. | wheel is too soft and wheel revolves at a very high speed |
| Answer» B. wheel is too soft or wheel revolves at a very slow speed | |
| 102. |
Negative rakes are used for |
| A. | carbide tools |
| B. | heavy loads |
| C. | harder materials |
| D. | all of these |
| Answer» E. | |
| 103. |
The tail stock set over method of taper turning is preferred for |
| A. | internal tapers |
| B. | small tapers |
| C. | long slender tapers |
| D. | steep tapers |
| Answer» D. steep tapers | |
| 104. |
In electro-discharge machining, tool is made of |
| A. | brass |
| B. | copper |
| C. | copper tungsten alloy |
| D. | all of these |
| Answer» E. | |
| 105. |
EDM machining is applied for |
| A. | shaping carbide dies and punches having complicated profiles |
| B. | making large number of small holes in sieves and fuel nozzles |
| C. | embossing and engraving on harder materials |
| D. | all of these |
| Answer» E. | |
| 106. |
The plunge grinding requires very __________ speed. |
| A. | high |
| B. | low |
| C. | Can't say |
| D. | None of these |
| Answer» C. Can't say | |
| 107. |
The negative rake is usually provided on |
| A. | high carbon steel tools |
| B. | high speed steel tools |
| C. | cemented carbide tools |
| D. | all of these |
| Answer» D. all of these | |
| 108. |
Cutting fluid has no effect on the tool life. |
| A. | True |
| B. | False |
| C. | Can't say |
| D. | None of these |
| Answer» C. Can't say | |
| 109. |
The keyways, grooves and slots cannot be cut on a shaper. |
| A. | True |
| B. | False |
| C. | Can't say |
| D. | None of these |
| Answer» C. Can't say | |
| 110. |
If the cutting speed is increased, then the built-up-edge |
| A. | becomes longer |
| B. | may or may not form |
| C. | becomes smaller and finally does not form at all |
| D. | has nothing to do with speed |
| Answer» D. has nothing to do with speed | |
| 111. |
Relief angles on high speed steel tools usually vary from |
| A. | 0° to 3° |
| B. | 3° to 10° |
| C. | 10° to 20° |
| D. | 20° to 30° |
| Answer» E. | |
| 112. |
In the relation VTn = C, the value of n for high speed steel tools varies from 0.25 to 0.40. |
| A. | Agree |
| B. | Disagree |
| C. | Can't say |
| D. | None of these |
| Answer» C. Can't say | |
| 113. |
For harder alloy steel, the point angle of the drill is kept |
| A. | equal to 118° |
| B. | less than 118° |
| C. | more than 118° |
| D. | any one of these |
| Answer» D. any one of these | |
| 114. |
In continuous chip cutting, the maximum heat is taken by the cutting tool. |
| A. | Yes |
| B. | No |
| C. | Can't say |
| D. | None of these |
| Answer» C. Can't say | |
| 115. |
The hardness of a grinding wheel is specified by |
| A. | Brinell hardness number |
| B. | Rockwel! hardness number |
| C. | Vickers pyramid number |
| D. | letter of alphabet |
| Answer» E. | |
| 116. |
When the metal is removed by erosion caused by rapidly recurring spark discharges between the tool and work, the process is known as |
| A. | electro-chemical machining |
| B. | electro-discharge machining |
| C. | ultra-sonic machining |
| D. | none of these |
| Answer» C. ultra-sonic machining | |
| 117. |
In __________ operation, the chip thickness is minimum at the beginning of the cut and it reaches to the maximum when the cut terminates. |
| A. | conventional milling |
| B. | climb milling |
| C. | face milling |
| D. | end milling |
| Answer» B. climb milling | |
| 118. |
Half nut is used to lock the lathe carriage to the lead screw for thread cutting. |
| A. | True |
| B. | False |
| C. | Can't say |
| D. | None of these |
| Answer» B. False | |
| 119. |
For fast removal of materials during grinding, a __________ grinding wheel is used. |
| A. | coarse grained |
| B. | fine grained |
| C. | medium grained |
| D. | None of these |
| Answer» B. fine grained | |
| 120. |
In drilling mild steel and brass, the point angle of a drill is 118°. |
| A. | True |
| B. | False |
| C. | Can't say |
| D. | None of these |
| Answer» B. False | |
| 121. |
The grinding of long, slender shafts or bars is usually done by |
| A. | infeed grinding |
| B. | through feed grinding |
| C. | endfeed grinding |
| D. | any one of these |
| Answer» C. endfeed grinding | |
| 122. |
The helix angle of a drill is __________ for drilling brass. |
| A. | equal to 30° |
| B. | less than 30° |
| C. | more than 30° |
| D. | None of these |
| Answer» C. more than 30° | |
| 123. |
The carbide tools operating at very low cutting speeds (below 30 m/min) |
| A. | reduces tool life |
| B. | increases tool life |
| C. | have no effect on tool life |
| D. | spoils the work piece |
| Answer» B. increases tool life | |
| 124. |
In electro-discharge machining, the tool is connected to cathode. |
| A. | Correct |
| B. | Incorrect |
| C. | Can't say |
| D. | None of these |
| Answer» B. Incorrect | |
| 125. |
The helix angle of a drill is more than 30° for drilling aluminium. |
| A. | Agree |
| B. | Disagree |
| C. | Can't say |
| D. | None of these |
| Answer» B. Disagree | |
| 126. |
A numerical method of identification of tool is known as tool signature. |
| A. | Correct |
| B. | Incorrect |
| C. | Can't say |
| D. | None of these |
| Answer» B. Incorrect | |
| 127. |
In conventional milling, the cutting force tends to lift the work. |
| A. | True |
| B. | False |
| C. | Can't say |
| D. | None of these |
| Answer» B. False | |
| 128. |
The lathe spindles are usually made hollow and provided with |
| A. | internal taper |
| B. | external taper |
| C. | internal and external taper |
| D. | no taper |
| Answer» B. external taper | |
| 129. |
In metal cutting operations, chips are formed due to plastic deformation of the metal. |
| A. | Agree |
| B. | Disagree |
| C. | Can't say |
| D. | None of these |
| Answer» B. Disagree | |
| 130. |
The cutting speed for drilling aluminium, brass and bronze with high speed steel drills varies from |
| A. | 10 to 20 m/min |
| B. | 18 to 30 m/min |
| C. | 24 to 45 m/min |
| D. | 60 to 90 m/min |
| Answer» E. | |
| 131. |
Ultra-sonic machining is best suited for |
| A. | tool steels |
| B. | sintered carbides |
| C. | glass |
| D. | all of these |
| Answer» E. | |
| 132. |
Glazing in grinding wheels can be decreased by |
| A. | using a harder wheel or by increasing the wheel speed |
| B. | using a softer wheel or by decreasing the wheel speed |
| C. | using a harder wheel or by decreasing the wheel speed |
| D. | using a softer wheel or by increasing the wheel speed |
| Answer» C. using a harder wheel or by decreasing the wheel speed | |
| 133. |
In ultra-sonic machining, tool is made of |
| A. | tungsten carbide |
| B. | brass or copper |
| C. | diamond |
| D. | stainless steel |
| Answer» C. diamond | |
| 134. |
Which of the following process is used for preparing parts having large curved surfaces and thin sections? |
| A. | Hot machining |
| B. | Ultra-sonic machining |
| C. | ECM process |
| D. | Chemical milling |
| Answer» E. | |
| 135. |
The stroke of a shaping machine is 250 mm. It makes 30 double strokes per minute. The overall average speed of operation is |
| A. | 3.75 m/min |
| B. | 5 m/min |
| C. | 7.5 m/min |
| D. | 15 m/min |
| Answer» D. 15 m/min | |
| 136. |
The factor which affects the tool life is |
| A. | tool geometry |
| B. | cutting speed |
| C. | feed rate |
| D. | all of these |
| Answer» E. | |
| 137. |
Crack in grinding wheel is developed due to |
| A. | high temperature developed at the contact of the wheel face and work |
| B. | grinding hard work |
| C. | low speed of wheel |
| D. | high speed of wheel |
| Answer» E. | |
| 138. |
Chemical milling operation is performed |
| A. | on universal milling machine |
| B. | on plain milling machine |
| C. | in a tank containing an etching solution |
| D. | any one of these |
| Answer» D. any one of these | |
| 139. |
The type of reamer used for reaming operation in a blind hole, is |
| A. | straight fluted reamer |
| B. | left hand spiral fluted reamer |
| C. | right hand spiral fluted reamer |
| D. | any one of these |
| Answer» D. any one of these | |
| 140. |
The binding material used in cemented carbide tools is |
| A. | tungsten |
| B. | chromium |
| C. | silicon |
| D. | cobalt |
| Answer» E. | |
| 141. |
The dressing and truing of grinding wheel are done with the same tools but not for the same purpose. |
| A. | Agree |
| B. | Disagree |
| C. | Can't say |
| D. | None of these |
| Answer» B. Disagree | |
| 142. |
The lip angle is the angle |
| A. | between the tool face and the ground end surface of flank |
| B. | made by the face of the tool and the plane parallel to the base of the cutting tool |
| C. | between the face of the tool and a line tangent to the machined surface at the cutting point |
| D. | none of the above |
| Answer» B. made by the face of the tool and the plane parallel to the base of the cutting tool | |
| 143. |
In a plain milling machine, the table can be moved |
| A. | longitudinally |
| B. | crosswise |
| C. | vertically |
| D. | all of these |
| Answer» E. | |
| 144. |
A bottoming tap has |
| A. | its end tapered for about three or four threads |
| B. | its end tapered for about eight or ten threads |
| C. | full threads for the whole of its length |
| D. | none of the above |
| Answer» D. none of the above | |
| 145. |
Crater wear is predominant in |
| A. | carbon tool steels |
| B. | tungsten carbide tools |
| C. | high speed steel tools |
| D. | ceramic tools |
| Answer» C. high speed steel tools | |
| 146. |
The size of a lathe is specified by the |
| A. | length between centres |
| B. | swing diameter over the bed |
| C. | swing diameter over the carriage |
| D. | all of these |
| Answer» E. | |
| 147. |
In a milling operation, two side milling cutters are mounted with a desired distance between them so that both sides of a workpiece can be milled simultaneously. This set up is called |
| A. | gang milling |
| B. | straddle milling |
| C. | string milling |
| D. | side milling |
| Answer» C. string milling | |
| 148. |
The top and sides of the table of a shaper usually have |
| A. | L-type slots |
| B. | T-type slots |
| C. | I-type slots |
| D. | any one of these |
| Answer» C. I-type slots | |
| 149. |
The chisel edge angle of a drill is usually 120° to 135°. |
| A. | Correct |
| B. | Incorrect |
| C. | Can't say |
| D. | None of these |
| Answer» B. Incorrect | |
| 150. |
A single point tool has |
| A. | rake angle |
| B. | cutting angle |
| C. | lip angle |
| D. | all of these |
| Answer» E. | |